Electrofluid valve



Jlil'le 9, 1931. E

ELECTROFLUID VALVE Filed Jan. 28. 1929 3 Sheets-Sheet 1 Ju'ne'9, 1931.

1 M. DEAN ELECTROFLUID VALVE Filed Jan. 28, 1929 3 Sheets-Sheet 2 (QW anvmtoz $2,1 4 lbtcm'w June 9, 1931.. M. DEAN 1,808,765

ELECTROFLUID VALVE Filed Jan. 28, 1929 3 Sheets-Sheet 3 r G) 6 Q q Patented June 9, 1931 UNITED STATES PATENT OFFICE MARK DEAN, 0F NEWARK, NEW JERSEY; FAY WALTER DEAN DEAN, DECEASED ELECTROFLUID VALVE Application filed January 28, 1929. Serial No. 335,438.

This invention relates to that class of valves in which the openingsand closing of the valve admits, or keeps out, as occasion requires, the supply of power for driving a suitable motor and commonly known as control valves.

Among the many important uses to which such control valves are put, may bementioned the regulation of the draft of, and 7 hence the heat received by or given olf from, a boiler, furnace, or the like, at any allotted time, or for any allotted work. For this purpose, the motor driven by the motive fluid is frequently a diaphragm, or the like, so arranged as to communicate the desired motion, usually slight, to a lever, or other device, which controls the draft in question.

The object of my invention is to provide a simpler, more efficient, more sensitive, more reliable, and less expensive type of this class of valves.

The, at present, preferred embodiment of my invention is shown in the accompanying drawings in which Figure l is a front elevation.

Figure 2 is a bottom plan.

Figure 3 is a top plan.

Figure 4 is a vertical section on line as of Fig. 3.

Figure 5 is a. vertical section on line 5-5 of Fig. 3.

Figure 6 is an enlarged detail of the inlet end of the valve.

Figure 7 is a section on line 7-7 of Figure 6.

Figure 8 is a section on line 88 of Figure 6.

Same letters indicate similar parts in the different figures.

A, is a base-board, or bracket, on which."

the valve-casing B, is mounted in any suitable manner, as by screws a, a. C, is the valve-rod, or bar, of suitable construction and, preferably, of metal. The valve-casing, as best shown in Figures 5, and 6, is a casting, tubular at its two ends 5, o, and squared at the center, to form a hollow chamber 6,

with a removable cover, or lid, f, held by screws g, By removal of this lid, free ac-.

cess may be had to the interior of the casing for the purposes of assembling the parts of.

the valve,oiling, cleaning, adjusting and the like.

The tubular ends of thecasing have ex ternal screw-threads h, h, to receive internally screw-threaded caps, or couplings, D, D,

by which the inlet and outlet plugs, E, F, are drawn into watertight connection with the valve casing. These plugs are threaded, respectively, on the inlet and outlet pipes, G, H, and are each provided with an annular flange, at, to be gripped by the plug, and a tapering nozzle, 9', j, which nozzles are alternately.

opened and closed by the shifting of the valve-rod, as hereafter explained, with the effect that, when the inlet nozzle is open'the outlet, or discharge nozzle is closed, and vice versa. It is to be understoodthatat all times when the valve is in condition for action,

the interior of the valve-casing, and its branches, are filled with the motive-fluid received through the inlet nozzle, and that this motive fluid exerts its motive pressure whenthe inlet nozzle is open and relaxes that pressure when the outlet'nozzle is opened, and the inletclosed. V y y The construction'andmechanism of the.

EXECU TOR 0F SAID MARK valve, by which the alternate actions of the motive fluid are produced and utilized, in a a simpler more elfective, more sensitive, more reliable, and less expensive construction than has been hitherto possible will now be explained.

The valve-rod C, is slidably supported within the casing B upon a thrust-sleeve, I,

of suitable diameter for easy slipping in the interior ofrthe tubular ends of the casing B. The shift to and fro, that is from contact with the inlet nozzle. to contact with the outlet nozzle, is very slight, and is brought about by the oppositelyextending rocker-arms, is, is, mounted on the shaft 1, in such relation that when one of the arms as Z0, approaches the horizontal positionjshown in Figure 5, the

rotation of the discgmflfon" the peg at the outer end of the arm, by a. cam-likeaction pushes the valve-stem toward the inlet nozzle, and

closes the inlet as shown,while the other 7 arm communicates a reverse cam-like action T tact with the exhaust nozzle. And vice versa,

when the valve rod is shifted to open the inlet and close the outlet. T o insure the, desired sensitiveness, quickness and effectiveness of' these shifting operations, the valve rod is 1 provided with twosetsof coiled springs, n, n, at each end. The inner coiled spring, 0, is a compensating spring designed-to correct any tendency which may exist by reason of the rolling contact of the disk on the end of the rocker arm when acting as a cam,'to make perfect connection at the nozzle month, this spring should be at least twice as strong as the outer spring, a, the function of which is to act as a sort of buffer and assist in zo throwing back the end ofthe rod when thenozzle to which itis applied-is opened. This spring may be identified as a buffer spring, as a distinction from the compensating spring. It would be obvious that the pres-- sure of the motive, fluid within the valve casing is always active, being approximately two atmospheres, or more; This pressure, therefore, is always exerted against the opening of either the inlet or outlet nozzle, and in both cases the pressure of the compensating spring is necessary. The buffer spring at the inlet opening may, if desired, be dis- I pensed with as the pressure of the motive liquid, or fluid, from the outsideof the valve without such buffer. At the outlet end, howgver, the bufi'er spring has been found use- The impulse by which this shifting of the rocker-arms is brought about, may be elec tric or otherwise, but, as electricity, is preferable, electric mechanism is shown in the drawings for that purpose.

A double-acting solenoid its two spools of wire,'K, K, is mounted in suitable proximity to the valve-casing B. Each spool is wound on a hollow spindle L, L, which is screw-threaded at its upper end into the valve-casing at p, p, and is closed at its lower end by a plug M, M. Within each hollow spindle is an armature N, N, slidably hung therein from one of the rockerarms 70, k, as shown in Figure 5. Three contact posts are mounted upon the top of the 55 bracket A, marked plus and minus,-the minus connection being q, and the positive, 7 r.

A suitable switch T, is mounted near the,

has been found sufiicient to open the inlet magnet J, with A motor, P, which is mounted on, or conveniently near, the bracket A, and operated by the pressure of the motive fluid in the valve-cas mg B. The stem Q, rises from the top of the bellows and is pivoted to the lever O, at u,

and asthe stem rises it pushes up the lever, thus, causing the lever to shift the switch T. The motive fluid is admitted to the bellows by the U-shaped connection pipe S, leading thereto from the bottom of the valve-casing,

as shown in Figures 1, 2, 4t, and 5.

The many advantages of my improved;

electroefluid valve, I think, will be obvious to those familiar with the art, without further explanation. A

I claim I V I An electro-fluid valve provided with a slidable valve-rod adapted to ply between the inlet and outlet openings of said valve, and

a pair of rockerjarms located in the hollow chamber of said casing, adapted to impart reciprocation-movements.to said rod,said' rod being provided with two sets of coiled springs at each end, the inner spring being approximately twice as strong as the outer spring and adapted to serve as a compensating spring for the buffer action of the outer spring. MARK DFA N 

